51515053312 has 36 divisors (see below), whose sum is σ = 103772316340. Its totient is φ = 25521205248.

The previous prime is 51515053309. The next prime is 51515053313. The reversal of 51515053312 is 21335051515.

It can be written as a sum of positive squares in 2 ways, for example, as 28769587456 + 22745465856 = 169616^2 + 150816^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51515053313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895173 + ... + 950980.

Almost surely, 2^51515053312 is an apocalyptic number.

It is an amenable number.

51515053312 is an abundant number, since it is smaller than the sum of its proper divisors (52257263028).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51515053312 is a wasteful number, since it uses less digits than its factorization.

51515053312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1846278 (or 1846264 counting only the distinct ones).

The product of its (nonzero) digits is 11250, while the sum is 31.

The spelling of 51515053312 in words is "fifty-one billion, five hundred fifteen million, fifty-three thousand, three hundred twelve".